<template>
	<div>
		<!-- 面包屑导航区 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
		  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
		  <el-breadcrumb-item>商品管理</el-breadcrumb-item>
		  <el-breadcrumb-item>添加商品</el-breadcrumb-item>
		</el-breadcrumb>
		
		<!-- 卡片视图 -->
		<el-card>
			<!-- 提示区域 -->
			<el-alert
			    title="添加商品信息"
			    type="info"
			    center
			    show-icon
				
				>
			  </el-alert>
			 <!--步骤条区 -->
			 <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
			   <el-step title="基本信息"></el-step>
			   <el-step title="商品参数"></el-step>
			   <el-step title="商品属性"></el-step>
			   <el-step title="商品图片"></el-step>
			   <el-step title="商品内容"></el-step>
			   <el-step title="完成"></el-step>
			 </el-steps>
			 
			 <!-- tab栏区 -->
			 <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
			  <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
			     <el-tab-pane label="基本信息" name="0">
					 <el-form-item label="商品名称" prop="goods_name">
						 <el-input v-model="addForm.goods_name"></el-input>
					 </el-form-item>
					 <el-form-item label="商品价格" prop="goods_price">
					 	 <el-input v-model="addForm.goods_price" type="number"></el-input>
					 </el-form-item>
					 <el-form-item label="商品重量" prop="goods_weight">
					 	 <el-input v-model="addForm.goods_weight" type="number"></el-input>
					 </el-form-item>
					 <el-form-item label="商品数量" prop="goods_number">
					 	 <el-input v-model="addForm.goods_number" type="number"></el-input>
					 </el-form-item>
					 <!-- 商品分类 -->
					 <el-form-item label="商品分类" prop="goods_cat">
						 <el-cascader
						     v-model="addForm.goods_cat"
						     :options="catelist"
						     :props="cateProps"
							 expand-trigger="hover"
						     @change="handleChange"></el-cascader>
					 </el-form-item>
				 </el-tab-pane>
			     <el-tab-pane label="商品参数" name="1">
					 <!-- 渲染表单的Item项 -->
					 <el-form-item v-for="item in manyTableData" :key="item.attr_id" :label="item.attr_name">
						 <el-checkbox-group v-model="item.attr_vals">
						     <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
						   </el-checkbox-group>						 
					 </el-form-item>
				 </el-tab-pane>
			     <el-tab-pane label="商品属性" name="2">
					 <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.arrt_id">
						 <el-input v-model="item.attr_vals"></el-input>
					 </el-form-item>
				 </el-tab-pane>
			     <el-tab-pane label="商品图片" name="3">
					 <!-- action：图片要上传的api地址 
						on-preview:预览图片的窗口
					 -->
					 <el-upload										  
					   action="http://127.0.0.1:8888/api/private/v1/upload"
					   :on-preview="handlePreview"
					   :on-remove="handleRemove" list-type="picture" :headers="headersObj" :on-success="handleSuccess" >
					   <el-button size="small" type="primary">点击上传</el-button>
					   
					 </el-upload>
				 </el-tab-pane>
				 <el-tab-pane label="商品内容" name="4">
					 <!-- 富文本编辑器 -->
					 <quill-editor v-model="addForm.goods_introduce">
						 
					 </quill-editor>
					 <!-- 添加商品按钮 -->
					 <el-button type="primary" class="btnadd" @click="add">添加商品</el-button>
				 </el-tab-pane>
				 
			   </el-tabs>
			   
			 </el-form>  
		</el-card>
		
		<!-- 图片预览 -->
		<el-dialog title="图片预览" :visible.sync="previewVisible"width="50%" class="previewImg">
		  <img :src="previePath" alt="">
		</el-dialog>
	</div>
</template>

<script>
import _ from 'lodash'
	export default{
		data() {
			return{
				activeIndex:'0',
				// 添加商品的表单数据对象
				addForm:{
					goods_name:'',
					goods_price:0,
					goods_weight:0,
					goods_number:0,
					// 商品分类
					goods_cat:[],
					pics:[],
					// 商品详情
					goods_introduce:'',
					attrs:[],
					
				},
				addFormRules:{
					goods_name:[
						{ required: true, message: '请输入商品名称', trigger: 'blur' },
					],
					goods_price:[
						{ required: true, message: '请输入商品价格', trigger: 'blur' },
					],
					goods_weight:[
						{ required: true, message: '请输入商品重量', trigger: 'blur' },
					],
					goods_number:[
						{ required: true, message: '请输入商品数量', trigger: 'blur' },
					],
					goods_cat:[
						{ required: true, message: '请选择商品分类', trigger: 'blur' },
					]
					 
				},
				// 商品分类列表
				catelist:[],
				cateProps:{
					label:'cat_name',
					value:'cat_id',
					children:'children'
				},
				// 动态参数数据列表数据
				manyTableData:[],
				// 静态属性数据
				onlyTableData:[],
				// 图片上传的请求头
				headersObj:{
					Authorization:window.sessionStorage.getItem('token')
				},
				// 触发预览事件的属性
				previePath:''	,
				// 隐藏对话框
				previewVisible:false,
				
			}
		},
		created() {
			this.getCateList()
		},
		methods:{
			async getCateList(){
				const{ data:res} =await this.$http.get('http://127.0.0.1:8888/api/private/v1/categories')
				if(res.meta.status!==200){
					return this.$message.error('获取商品数据失败')	
				}
				this.catelist=res.data
				console.log(this.catelist)
			},
			// 级联选择器会触发函数
			handleChange(){
				console.log(this.addForm.goods_cat)
				if(this.addForm.goods_cat.length!==3){
					this.addForm.goods_cat=[]
				}
				
			},
			beforeTabLeave(activeName,oldActiveName){
				if(oldActiveName==='0' && this.addForm.goods_cat.length!==3){
					this.$message.error('请先选择商品分类')
					return false
				}
			},
			// 标签页点击事件
			async tabClicked(){
				if(this.activeIndex==='1'){
					const{ data:res} =await this.$http.get(`http://127.0.0.1:8888/api/private/v1/categories/${this.cateId}/attributes`,
					{params:{sel:'many'}
					})
				
			
					if(res.meta.status!==200){
					return this.$message.error('获取动态参数列表失败！')
					}
					
					res.data.forEach(item => {
						item.attr_vals =item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
						
					})
					console.log(res.data)
					this.manyTableData=res.data
					
				}else if(this.activeIndex==='2'){
					const{ data:res} =await this.$http.get(`http://127.0.0.1:8888/api/private/v1/categories/${this.cateId}/attributes`,
					{params:{sel:'only'}
					})
					
					if(res.meta.status!==200){
					return this.$message.error('获取静态属性失败！')
					}
					console.log(res.data)	
					this.onlyTableData=res.data
				}
				
				
			},
			// 处理图片阅览效果
			handlePreview(file){
				console.log(file)
				this.previePath=file.response.data.url
				this.previewVisible=true
			},
			// 处理移除图片的操作
			handleRemove(file){
				console.log(file)
				// 1.获取要删除的图片路径
				const filePath=file.response.data.tmp_path
				// 2.从pics数组中，找到这个图片对应的索引值
				const i= this.addForm.pics.findIndex(x => x.pic=== filePath)
				// 3.调用数组中splice方法，把图片信息移除
				this.addForm.pics.splice(i,1)
				console.log(this.addForm)
			},
			// 监听图片上传成功的事件
			handleSuccess(response){
				console.log(response)
				// 1.拼接得到一个图片对象
				const picInfo ={pic: response.data.tmp_path}
				// 2.将图片对象 push到pics到数组中
				this.addForm.pics.push(picInfo)
				console.log(this.addForm)
			},
			// 添加商品
			add(){
				this.$refs.addFormRef.validate(async valid=>{
					if(!valid){
						return this.$message.error('请填写必要的表单项！')
					}
					// 执行添加业务逻辑
					// lodash cloneDeep(obj)深拷贝
					const form =_.cloneDeep(this.addForm)
					form.goods_cat =form.goods_cat.join(',')
					// 处理动态参数
					this.manyTableData.forEach(item=>{
						const newInfo={attr_id:item.attr_id,attr_value:item.attr_vals.join(' ')}
						this.addForm.attrs.push(newInfo)
					})
					// 处理静态属性
					this.onlyTableData.forEach(item=>{
						const newInfo={attr_id:item.attr_id,attr_value:item.attr_vals}
						this.addForm.attrs.push(newInfo)
					})
					form.attrs=this.addForm.attrs
					console.log(form)
					// 发起请求添加商品
					// 商品名称必须唯一
					const {data:res} = await this.$http.post(`http://127.0.0.1:8888/api/private/v1/goods`,form)
					
						if(res.meta.status!==201){
						return this.$message.error('添加失败！')
						}
						this.$message.success('添加成功')
						this.$router.push('/goods')
					
					
				})
			}
		},
		
		computed:{
			cateId() {
				if(this.addForm.goods_cat.length=== 3 ) {
					return this.addForm.goods_cat[2]
					}
				return null
				}
			}
		
	}
	
</script>

<style lang="less" scoped>
	.el-checkbox{
		margin: 0 5px 0 0 !important;
	}
	img{
		width: 400px;
		height: 260px;
	}
	.btnadd{
		margin-top: 15px;
	}
</style>
